It runs along the full length of the Danube; from Donaueschingen in Germany to the Black Sea. It passes through Germany, Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria and Ukraine.
I hired a bike and spent a day on part of the path near the German town of Passau. From the photograph you can see the path is in very good condition. It is also next to a busy main road and there can be a lot of traffic noise.
|Self service outside the bike hire shop in Passau|
Most of the path is on the banks of the river, but it does sometimes divert away from the river and not all of it is flat.
|The path in Passau|
Another good section to cycle might be the approx 125 km from Regensberg to Passau.